21450728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{863}}^1$

素因数の和:1121

約数の個数: 32

約数和(自身を含む): 43545600

約数和(自身を除く): 22094872

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 239, 478, 863, 956, 1726, 1912, 3107, 3452, 6214, 6904, 11219, 12428, 22438, 24856, 44876, 89752, 206257, 412514, 825028, 1650056, 2681341, 5362682, 10725364, 21450728]

約数ペア:

[(1, 21450728), (2, 10725364), (4, 5362682), (8, 2681341), (13, 1650056), (26, 825028), (52, 412514), (104, 206257), (239, 89752), (478, 44876), (863, 24856), (956, 22438), (1726, 12428), (1912, 11219), (3107, 6904), (3452, 6214)]